“When I saw the new £5 note, I thought, ‘Wouldn’t it be good if I could engrave something on it.

“I didn’t know what at first, but then I found out that next year is going to be the 200th anniversary of Jane Austen’s death and her image is also going to be on the new £10 note, which is coming out next year, so it ties in quite nicely with that.

“The beauty of this is that in the right light you can’t see the engraving at all, but when you turn the note and the light comes at a different angle, it appears.

“I’ve no idea how much they will be worth if people try to sell them. But previous pieces I have worked on have been insured for more than £50,000.